package com.team5101.util;

public class StringUtil {
    public static String getStringUtil(String ... codes){
        StringBuilder sb = new StringBuilder();
        for (String code:codes) {
            sb.append(code);
        }
        return sb.toString();
    }



    public static String getFileExtName(String fileName){


        int las = fileName.lastIndexOf(".");

        return fileName.substring(las+1);

    }


}
